DC Rotary Solenoid for Precision Motion Control

High Torque DC Rotary Solenoid for Automation

Compact DC Rotary Solenoid for Industrial Use

DC Rotary Solenoid Actuator for Smart Systems

DC Rotary Solenoid for Fast Response Systems

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WL490 DC Rotary Solenoid Selection Guide

The term “DC rotary solenoid” means an electromagnetic actuator converting electric current into a small quantity of rotary motion. Linear solenoids produce linear motions in contrast to the rotary ones that have the possibility of producing rotation within a certain angle, usually equal to 25°, 45°, or 90°. The construction of a DC rotary solenoid consists of three main elements: the coil, rotor (armature), and return system that includes either a spring or gravity. When applying DC voltage, the coil becomes active and generates a magnetic field that drives the rotor to rotate. Then, once disconnected from electricity, the rotor is returned to its original position because of the work of the return mechanism. DC rotary solenoids are used everywhere, where it is necessary to have controlled movements and precise control over them.

Main Features Of DC Rotary Solenoid

As you already know, DC rotary solenoid has several basic features. One of them is the rapid response and ability to react quickly. Another feature is compactness, the fact that it is a very tiny machine but still produces powerful and reliable rotations. Thirdly, the torque produced is proportional to the torque provided, which results in a high torque-to-size ratio of DC rotary solenoids. They have a possibility of performing accurate angular positioning over specified angles, as well as operating with any DC voltage (12V or 24V). As you see, it is a very versatile tool that has been used everywhere for a very long period of time.

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WL490 DC Rotary Solenoid Actuator Product Overview

The DC rotary solenoid represents crucial elements of the modern automation process due to providing rotary movements that occur owing to the laws of electromagnetism. In addition to the compactness, fast operation, and high durability of the device, its major advantage is that it produces significant torque while rotating a relatively small angular distance. The wide field of application of DC rotary solenoids is explained by the ability to use this mechanism in different areas, ranging from complex machines of industry to household appliances. It should be mentioned that DC rotary solenoids can be used to satisfy various engineering demands due to the variable voltage, rotation angle, and torque of the device.

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WL490 DC Rotary Solenoid Technical Data Sheet

Brand	Weilong Technology	Model Number	WL490
Rated Voltage (V)	DC 12V, 18V, or 24V	Rated Power (W)	70-120 W
Work Model	Rotation	Torque Force (N)	0.031 —– 0.042 Nm
Rotating Angle	From 25, 45, 60, or 90 degrees	Working Duty	10%—100%
Service Life	500 Thousand Times	Certification	CE, RoHS, ISO9001,
Material	Carbon Steel Housing	Lead Wire Length (mm)	300
Install Style	screw	Tolerance of Dimension	+/- 0.1 MM
Water-proof	None	Insulation Class	B
Hi-Pot Test	AC 600V 50/60Hz 2s	Non-excitation Holding Force	0
Working Temperature	-10°C-100°C	Duty Cycle	1-100%
Thread Depth (mm)	/	Payment Term	TT, or LC At Sight
Sample Order	Yes	Warranty	1 Year
MOQ	1000 PCS	Supply Ability	5000 pcs per Week
Delivery Time	30 Days	Port of Loading	shenzhen

Some important things about Weilong DC rotary solenoids are the following:
• The angle of rotation can be as high as 95°, depending on the type.
• Starting torque can be as high as 13 Nm (gross starting torque at 20°C)
• Long life: More than 1 million cycles
• Put together with studs
• Quick response time: Switching times of less than 5 ms are possible, but only if the load and size are right.
• A lot of standard choices, like metric or SAE threads, a shaft on either side, a return spring, a dust cover, and tapped holes in the armature plate.
• Optional noise reduction option (special dust cover)
• Viscous damping for sizes 490 and 590 (smooth operation, soft endstop, less noise)

industrial DC rotary solenoid applications

DC Rotary Solenoid Actuator short Description

It is a type of electromagnetic actuator that can operate under direct current, producing rotary motion instead of linear one, thus making it suitable for applications where linear motions are unnecessary. A DC rotary solenoid provides a compact and powerful actuator to make some components rotate around some point. It can operate under the action of any DC voltage level, being very durable and having easy maintenance and adjustment capabilities. Being highly demanded in industries and everyday life, it is used in all fields, from industry to medicine, to create automated and precisely controlled machines. Moreover, DC rotary solenoids take little space while providing big torque, which is why they are often used in places with a lack of space.

🔹 How Does the DC Rotary Solenoid Work

When the current flows through the coil of a DC rotary solenoid, it creates a magnetic field and drives the rotor to rotate to the specified angle due to special slots or helical grooves made specifically for the translation of magnetic power into rotational movements. The rotary motion is then turned into the angular positioning thanks to the same principle and a special return mechanism that brings the rotor back when the power is disconnected.

DC Rotary Solenoid Actuator Application

Since there are a lot of applications of DC rotary solenoids, it is very hard to enumerate even half of them. In the industry, they serve as a part of sorting systems, packaging machines, and robotic systems. Furthermore, they can be found in the smart locks for doors, locks for safes, or in any access control system where opening or closing should happen rapidly and effectively. Automotive applications include vent systems and fluid management, as well as door locks. DC rotary solenoids are also often used in diagnostic tools and other medical machinery. For air conditioning systems, they help regulate air flow. Moreover, they are used in cameras and optical devices.

compact DC solenoid solenoid actuator advantage and disadvantage

DC Rotary Solenoid Pros and Cons

There are both pros and cons of using DC rotary solenoids in your system. Among the main advantages of these actuators are fast responses, angular positioning capabilities, compact sizes, powerful torque provided for a very small component, low maintenance, and smooth and vibration-free DC operation. Among the disadvantages are the fact that a DC rotary solenoid can produce rotations only in a predefined range of angles, can consume a great amount of energy to produce the required motion, and can overheat.

Troubleshooting of DC Rotary Solenoid

A DC rotary solenoid can experience some technical difficulties related to its working process. Among them is inability to work properly, weak torque, overheating, and a sticky rotor. To solve these problems, you should first check the power source, wires, connections, and coil resistance because a burnt-out coil will not function as required. The problem of low torque can be caused by low voltage, a large load on the actuator, or some damage inside it. Overheating occurs in case of prolonged operation of a DC rotary solenoid, so you should follow its duty cycle. A sticky rotor is caused by dust or dirt stuck in the mechanism.

FAQs Of DC Rotary Solenoid Actuator

1. What is A DC-rotary solenoids

It is an electromagnetic actuator providing precise and controlled angular motion.

2. How is it different from a linear one?

A linear solenoid produces linear motions, whereas a rotary solenoid produces rotary ones at defined angles.

3. What rotation angles do they have?

Available angles include 25°, 30°, 45°, 60°, and 90°.

4. What voltage does it use?

They are usually used with 6V, 12V, or 24V DC voltage, although there are other types.

5. Can it work continuously?

No, most of them can perform only short duty cycles. Continuous duty requires additional technical improvements.

6. What factors affect the torque of a rotary solenoid?

Among such factors are the coil, voltage, duty cycle, and load.

7. What is it used for?

Locks, valves, diagnostics equipment, automation systems, and camera mechanisms.

8. What measures can prolong its service life?

Applying the appropriate voltage, avoiding loading it too much, cooling, and maintaining regularly.

How to Choose a DC Rotary Solenoid

It may seem hard to choose a DC rotary solenoid, but it’s actually pretty simple: just make sure the device’s specs match the needs of your application. The best choice strikes a balance between motion, force, speed, and durability for the best performance.

Step 1: First, figure out what your application needs
Get clear on these three main points before you look at any datasheets. These will help you make choices.Torque and Angle: How much twisting force do you need? What is the exact angle of rotation that your mechanism needs? Most of the time, the maximum angles are between 30° and 110°.

How fast does the solenoid need to turn? How often will it cycle (for example, how many cycles per minute)?

Duty Cycle: How often will the solenoid be on and off? This is very important to keep things from getting too hot.

Step 2: Choose the Right Type of Solenoid for Your Job

The best place to start is by learning about the three main ways it works. Everything else depends on your choice here.

This is the most common type of rotary solenoid. It has an ON and OFF switch. When you turn on the power, it moves to a set end-stop position. It’s great for basic, fast “indexing” or “diverting” tasks where you don’t need to change the speed.

Proportional Rotary Solenoid: You can control the rotation and torque of a proportional solenoid directly by changing the input current. This is different from an on/off type. Use this when you need to move something to a specific place, like turning a valve or a shutter.

Bistable (Latching) Rotary Solenoid: This kind uses a permanent magnet to keep its place even when there is no power. It can switch between its two stable states with just one electrical pulse. This is the best choice for battery-powered devices because it doesn’t use any power to stay in place.

Step 3: Look at the most important technical details

Keep the type of solenoid in mind as you use your needs from Step 1 to look at the numbers on a datasheet.

Torque is not just one number; be careful how it is written down. “Starting torque” (the force at the start of the stroke) can be very different from “ending torque” (the force just before the stop). Make sure that the torque rating is at least what you need for the whole rotation.

Voltage and Resistance: Pick a voltage that works with the power supply you have (for example, 12V or 24V DC are common). The coil’s resistance affects the amount of current (Amps) that it draws, which you will need for your power budget.

Direction of Rotation: Most rotary solenoids only move in one direction, but some can be set to move in either a clockwise (CW) or counterclockwise (CCW) direction by simply changing the polarity of the voltage that is applied.

Step 4: Check that it works and fits in the environment

The last step is to make sure that the solenoid will work in the real world of your system.

Duty Cycle and Heat: The duty cycle (%) tells you how much power you can use. Overheating and failure happen when the rated duty cycle is exceeded. Look for a solenoid with a lower power rating or one that is specifically designed for “continuous duty” if you need it to work all the time (100% duty cycle).

Mechanical Life: Datasheets usually say how many cycles the device is expected to last, which can be anywhere from 10 million to over 100 million. Check to see if this meets the needs of your product’s lifespan.

Check the IP rating (for example, IP20 is common for clean, indoor use) to see if it protects the environment. If you need to use something in a harsh or outdoor setting, you might need a sealed unit or materials that don’t let moisture or dust in, like stainless steel housings.

A Quick Summary of Your Selection Path

Here is a simple way to visualize your decision-making process based on your primary need:

If your priority is…	Then you should choose…	Why it’s the best fit
Simple On/Off control	ON/OFF (Standard) Rotary Solenoid	Cost-effective, high-speed, simple to drive -1
Variable positioning	Proportional Rotary Solenoid	Torque/position is directly controllable by current -7
Energy efficiency	Bistable (Latching) Rotary Solenoid	Holds position with zero power consumption -5 -9
High cycle life	ON/OFF with robust materials (e.g., ball bearings)	Look for models rated for >100 million cycles